Scroll Compressor Analytical Model
Scroll Compressor Analytical Model
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发表时间：
1984
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通讯作者：
E. Morishita;M. Sugihara;T. Inaba;T. Nakamura
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作者：
E. Morishita;M. Sugihara;T. Inaba;T. Nakamura
采用轴向和径向密封技术的涡旋压缩机的效率与其他旋转式和往复式压缩机的效率相比具有竞争力。轴承负载和扭矩平稳，实现安静运行。因此，该机器特别适用于空调应用。研究了采用渐开线的涡旋压缩机。计算了置换体积。轴向、切向和径向压力分量然后通过假设等熵或多方过程获得。建立了涡旋盘和奥尔德姆联轴器的运动方程。对这些方程进行了解析求解，并计算了动涡盘和奥尔德姆联轴器的运动。动涡旋盘的运动受奥尔德姆联轴节惯性力的影响，径向密封力以两倍于旋转频率的频率变化。估算了作用在动涡盘上的倾覆力矩，阐明了动涡盘的稳定性条件。涡卷机是由Creuxll于1905年发明的，目前因其高效率和平稳运行而引起设计师的关注。汽车压缩机和空调的应用在日本已经商业化2l，3），4），并有望进一步发展。轴向和径向密封是最关键的技术，并且从过去就被认识到。Creuxll指的是由弹簧轴向挤压的叶尖密封（参考文献（1）中的蒸汽密封）。径向密封技术也是已知的;S），6）它们利用旋转部件的离心力或通过类似摆动连杆的机构从压力负载产生径向分量。介绍了涡旋式流体机械的概念，它具有轴向密封和切向密封7），8）。并对该涡旋压缩机进行了实际开发。1981年，市场上出现了采用这两种密封技术的涡旋压缩机2l。涡旋压缩机具有密封性好、运转平稳、无噪音、无阀门、结构简单、摩擦转速低等优点。并从理论上对机器进行了分析。位移量是由圆的渐开线的几何性质得到的。切向、径向和轴向压力载荷是通过假设等熵或多变压缩过程计算的。对涡旋盘和奥尔德姆联轴节的运动规律至今还没有研究。为了明确设计条件，建立了涡旋压缩机这两部分的运动方程，包括摩擦力。对这些方程进行了解析求解，并计算了作用在动涡盘和奥尔德姆联轴器上的力。奥尔德姆联轴节的惯性力传递给动涡盘。径向密封力必然受到影响，并且以两倍于旋转频率的频率变化。估算了作用在动涡盘上的倾覆力矩，给出了动涡盘的稳定性条件。涡旋压缩机的几何理论涡旋压缩机的位移容积和容积比涡旋的主要几何参数如图1所示。我的天啊！滚动厚度滚动（Scroll Thickness Scroll）
The efficiency of the scroll compressor which employs the axial and the radial sealing techniques is competitive with that of the other rotary and the reciprocating compressors. The bearing load and the torque are smooth so that quiet operation is realized. 'l'herefore the machine is suitable particularly for air conditioning application. The authors have studied the scroll compressor which utilizes an involute of a circle. The displacement volume is calculated. The axial, tangential and radial pressure components are then obtained by assuming the isentropic or polytropic processes. The equations of motion are established for the orbiting scroll and the Oldham coupling. These equations are solved analytically and the motion of the orbiting scroll and the Oldham coupling is calculated. The motion of the orbiting scroll is influenced by the inertia force of the Oldham coupling, and the radial sealing force changes with a frequency twice that of the rotation. The overturning moment \lhich acts on the orbiting scroll is estimated, and the stability condition for the orbiting scroll is clarified. INTRODUCTION The scroll machine was invented by Creuxll in 1905 and is currently attracting the designers' attention because of its high efficiency and smooth operation. Application for car compressors and air conditioning is commercialized in Japan2l ,3), 4) and further development is expected. Axial and radial sealing are the most critical techniques and have been recognized from the old days. Creuxll referred to the tip seal (steam-tight in Reference (1)) which was pressed axially by the spring. The radial sealing techniques are 487 also known;S) ,6) they employ the centrifugal force of the rotating parts or produce the radial component from the pressure load by a mechanism like the swing link. The idea of the scroll fluid machinery was introduced; it was eguipped with axial and tangential sealing7),8). The practical development of this scroll compressor was also conducted9 l ,10). The scroll compressor appeared on the market in 1981 utilizing these two sealing techniques2l . The authors realized that the scroll compressor has inherent advantages (good sealing, smooth operation, stillness, no valve, simple structure, low rubbing speed, etc.) and analyzed the machine theoretically. The displacement volume is obtained from the geometric character of the involute of a circle. The tangential, radial and axial pressure loads are calculated by assuming the isentropic or polytropic compression processes. The motion of the orbiting scroll and the Oldham coupling has not been studied so far. To clarify the design conditions, the equations of motion are established for these two parts of the scroll compressor, including the friction. The equations are solved analytically and the forces acting on the orbiting scroll and the Oldham coupling are calculated. The inertia force of the Oldham coupling istransmitted to the orbiting scroll. The radial sealing force is necessarily influenced and changes with a frequency twice that of the rotation. The overturning moment which acts on the orbiting scroll is estimated, and the stability condition is given for the orbiting scroll. GEOMETRIC THEORY OF SCROLL COMPRESSOR Oisplacement Volume and Build-in Volume Ratio The major geometric parameters of the scroll are shown in Fig. 1. y a fbllus cl a Ba!e Cirde SOOII Atdl Scroll Thickness Scroll~ I 1\UTber d Sat>lls4 1:1 lrM:lklle IniTial twje )